Piston-rod packing.



' 'No. 724,698. Q PATENTED APR, 7, 190 3- I G. A. HARDER & J. LARIVIBRBf PISTON ROD PAGKING.'

- APPLICATION TILED SEPT. 27' 1902 I0 XODEL.

UNITED; STATES;

PATENT OFFICE.

GEORGE A. HARDER AND OSEPHLA RIVIERE, OF GREENRIVER, WYOMING.

'.PlSTONf.-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 724,698, dated April7,1903. Application filed September 27, 1902. Serial No. 125 ,112. (Nomodel.)

To all whom it may concern: 7

Be it known that we, GEORGE A. HARDER and JOSEPH LA 'RIVIERE, citizensof the United States, residing at Greenriver, in the county ofSweetwater and State of Wyoming, have invented a new and usefulPiston-Rod Packing, of which the followingis a specification.

This invention relates to metallic packing to be used in connection withpiston-rods or valve-stems.

The object of the invention is in a simple ready, thoroughly efficient,and practicalmannor to obviate wear of the packing when no steam is onthe cylinder, to provide for proper adjustment of the packing to causeit always to occupy a position at right angles to the rod or stem,tofacilitate adjustment of the packing to the rod or stem to compensatefor wear, and generally to improve that class of metallic packings whichare applied to a rod or stem by steam-pressure and released from contacttherewith when steam-pressure is removed.

With these and other objects in view, as will appear as the nature ofthe invention is better understood, the same consists in the novelconstruction and combination of parts of a metallic packing, as will behereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, andin which like numerals of reference indicate corresponding paits, thereis illustrated one form of embodiment of the invention capable ofcarrying the same into practical operation, it being understood inpractice that various changes as to shape, proportion, and exactassemblage of the parts may be resorted to without departing from thespirit thereof, and in these drawingshibiting the packing of the presentinvention as applied tothe stufling-box of a cylinder. Figure 2 is acollective detail view in perspective of the difierent parts of thepacking.

Referring to the drawings, 1 designates a portion of a steam cylinderprovided with the usual cup-like projection 2 to constitute astuffing-box, the end of which isclosed by a cap or plate 3. Within thestufting-box is Figure l s a view in sectional elevation, ere

arranged. .a casing .4, housing the metallic packing constituting thegist of the present invention. The casing is of less diameter and lengththan the stuffing-box to present passage-ways 5 and 6, through whichsteam from the cylinder escapes and passes through openings 7 in thecasingto within the same. :The'inner end of the casin g carries an adjusting-nut 8,which has a threaded connection with the casing, and theouter end is provided with'a flange 9 to bear against the end of thestuffiug-box and is held inposition by means ofthe cap-plate 3. 3 Thepacking-ring, of which' there are two shown in this instance, compriseseach an outer ring 10 and an inner ring 11, both of which are providedwith a peripheral groove 12 and 13, respectively, in which is fitted aclamping wire or band 14 and 15, respectively, these bands beingprovided for the purpose of holding the sections of the rings assembled,but not to cause them to bind upon the piston-rod or valve-stem withwhich they c'oact. 1

The outer ring 10 is chambered at 16 to receive the inner-ring 11, whichlatter, as shown in Fig. 1, lies flush with the outer face of the flange17, formed by the chamber. Both of the rings are split, the meetingedges of the sections being disposed obliquely or substantiallytangential to the walls of the piston- .rod or valve-stemv opening, asshown at 18 and 19, and by this arrangement as the rings wear down theywill be permitted to approach each other under the slight pressingaction of the rings or bands, and thus automatically adjust themselvesto the part on which they work. When the ring 11 is seated within thechamber of the ring 10, the joints of the two rings are arranged inbreak-joint order, thereby to prevent escape of steam when the same ison the cylinder. 7

Interposed between the outer faces of the two rings 17 and the ends ofthe casing are two disks 20 and 21, which neatly fit the piston-rod orvalve-stem and are ground to fit closely against the said ends of thecasing in order to present a steam-tight joint, the function of thesedisks being to hold the rings true with relation to the rod or stem,thus to prevent uneven wear. Lateral looseness of the rings withrelation to each other is taken up the adjusting-nut 5.

by these disks being forced thereagainst by It is to be understood, ofcourse, that the packing-rings are never to be clamped so tightlytogether by the adj usting-nut as to interfere with their instantresponse to steam-pressure, so that there will be no loss of steam whenfirst ad mitted to the cylinder or the like. 1

Under normal conditions-that is to say, when there is no steam on thecylinder, as when running down steep grades-there is practically nofrictional contact between the rings and the piston, so that wear of theparts is thus precluded; but as soon as steam is applied to the cylinderthe rings are caused to impinge the pistoncrod with a pressure varyingwith the steam-pressure on the cylinder, so that a steam-tight juncturebetween the rings and the piston will always be assured.

The double or two-part packing-ring herein described is adapted forheavy work; but for light work the outer ring may be dispensed with andwill be found to perform the functions required in a thoroughlysatisfactory manner.

The mannerin which the ring-casing is held in position with thestufling-box is one of many ways in which this can be accomplished, andfor this reason it is to be understood that the invention is not to belimited to the precise arrangement shown.

What we claim is- 1. A metallic packing comprising a casing providedwith steam-inlet openings, and with an adjusting-nut, a plurality ofsplit rings housed within the casing and adapted to fit loosely upon thepart with which they coact, and disks interposed between the ends of thecasing and fitted snugly upon the part with which they coact, the saiddisks through the agency of the adj usting-nut operating to hold therings in proper operative position.

2. A metallic packing comprising a casing adapted to be positioned inthe stufling-box of a cylinder or the like and provided with steam-.inlet openings, a plurality of split rings disposed within the casingand having their joints disposed tangentially to their rodopenings,means for holding the ring sections loosely assembled, disks disposed onthe outer sides of the rings,'. and an adjusting-nut carried by thecasing and adapted by contact with one of the disks to hold the rings inproper operative relation to the object with which they coact.

3. A metallic packing comprising a casing provided Withsteam-inletopenings and with an adjusting-nut, outer sectional packingrings eachprovided with a chamber, inner sectional packing rings fitting withinthe chambers and lying flush with one side of the outer packing-rings,means for'holding the ring-sections loosely assembled, and disksdisposed on the outer sides of the outer rings and adapted, through theagency of the ad.-

justing-nut to hold the rings in proper operative relation to the partwith which they coact.

In testimony that we claim the foregoing as our own we have heretoaflixed our signatures in the presence of witnesses.

GEORGE A. HARDER. JOSEPH LA RIVIERE.

Witnesses as to George A. Harder:

A. B. HOSBROOK, F. W. MYERS.

Witnesses as to Joseph La Riviere:

P. E. DU SAULT, CHAS. RUMBLE.

